What is CVE-2021-41581?

CVE-2021-41581 is a medium-severity vulnerability in Openbsd Libressl, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-09-24.

How severe is CVE-2021-41581?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-41581 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Out-of-bounds Read in Openbsd Libressl

CVE-2021-41581

x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read. When the input exceeds DOMAIN_PART_MAX_LEN, the buffer lacks '\0' termination.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (45.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Openbsd Libressl
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

ChrisAdkin8/Nomad-Job-Vulnerability-Tagging

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-41581?: CVE-2021-41581 is a medium-severity vulnerability in Openbsd Libressl, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-09-24.
How severe is CVE-2021-41581?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-41581 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.